www.pudn.com > Direct3D_ZBuffer.zip > Cuboid.cpp

// Cuboid.cpp: implementation of the CCuboid class. 
// 
////////////////////////////////////////////////////////////////////// 
 
#include "Cuboid.h" 
 
////////////////////////////////////////////////////////////////////// 
// Construction/Destruction 
////////////////////////////////////////////////////////////////////// 
 
CCuboid::CCuboid(LPDIRECT3DDEVICE8 pD3DDevice) 
{ 
	m_pD3DDevice = pD3DDevice; 
	m_pVertexBuffer = NULL; 
 
	//Set a default size and position 
	m_rWidth = 10.0; 
	m_rHeight = 10.0; 
	m_rDepth = 10.0; 
	m_rX = 0.0; 
	m_rY = 0.0; 
	m_rZ = 0.0; 
 
	//Initialize Vertex Buffer 
    if(SUCCEEDED(CreateVertexBuffer())) 
	{ 
		UpdateVertices(); 
	} 
} 
 
CCuboid::~CCuboid() 
{ 
	SafeRelease(m_pVertexBuffer); 
} 
 
bool CCuboid::Render() 
{ 
	m_pD3DDevice->SetStreamSource(0, m_pVertexBuffer, sizeof(CUBIOD_CUSTOMVERTEX)); 
    m_pD3DDevice->SetVertexShader(CUBIOD_D3DFVF_CUSTOMVERTEX); 
    m_pD3DDevice->DrawPrimitive(D3DPT_TRIANGLESTRIP, 0, 2);		//Top 
	m_pD3DDevice->DrawPrimitive(D3DPT_TRIANGLESTRIP, 4, 8);		//Sides 
	m_pD3DDevice->DrawPrimitive(D3DPT_TRIANGLESTRIP, 14, 2);	//Bottom 
 
	return true; 
} 
 
HRESULT CCuboid::CreateVertexBuffer() 
{ 
    //Create the vertex buffer from our device. 
    if(FAILED(m_pD3DDevice->CreateVertexBuffer(18 * sizeof(CUBIOD_CUSTOMVERTEX), 
                                               0, CUBIOD_D3DFVF_CUSTOMVERTEX, 
                                               D3DPOOL_DEFAULT, &m_pVertexBuffer))) 
    { 
        return E_FAIL; 
    } 
 
    return S_OK; 
} 
 
bool CCuboid::UpdateVertices() 
{ 
	VOID* pVertices; 
 
    //Store each point of the cube together with it's colour 
	//Make sure that the points of a polygon are specified in a clockwise direction, 
	//this is because anti-clockwise faces will be culled 
	//We will use a three triangle strips to render these polygons (Top, Sides, Bottom). 
    CUBIOD_CUSTOMVERTEX cvVertices[] = 
    {	 
		//Top Face 
		{m_rX - (m_rWidth / 2), m_rY + (m_rHeight / 2), m_rZ - (m_rDepth / 2), D3DCOLOR_XRGB(0, 0, 255),},		//Vertex 0 - Blue  
        {m_rX - (m_rWidth / 2), m_rY + (m_rHeight / 2), m_rZ + (m_rDepth / 2), D3DCOLOR_XRGB(255, 0, 0),},		//Vertex 1 - Red  
        {m_rX + (m_rWidth / 2), m_rY + (m_rHeight / 2), m_rZ - (m_rDepth / 2), D3DCOLOR_XRGB(255, 0, 0),},		//Vertex 2 - Red  
		{m_rX + (m_rWidth / 2), m_rY + (m_rHeight / 2), m_rZ + (m_rDepth / 2), D3DCOLOR_XRGB(0, 255, 0),},		//Vertex 3 - Green  
 
		//Face 1 
		{m_rX - (m_rWidth / 2), m_rY - (m_rHeight / 2), m_rZ - (m_rDepth / 2), D3DCOLOR_XRGB(255, 0, 0),},		//Vertex 4 - Red  
        {m_rX - (m_rWidth / 2), m_rY + (m_rHeight / 2), m_rZ - (m_rDepth / 2), D3DCOLOR_XRGB(0, 0, 255),},		//Vertex 5 - Blue  
        {m_rX + (m_rWidth / 2), m_rY - (m_rHeight / 2), m_rZ - (m_rDepth / 2), D3DCOLOR_XRGB(0, 255, 0),},		//Vertex 6 - Green  
		{m_rX + (m_rWidth / 2), m_rY + (m_rHeight / 2), m_rZ - (m_rDepth / 2), D3DCOLOR_XRGB(255, 0, 0),},		//Vertex 7 - Red  
 
		//Face 2 
		{m_rX + (m_rWidth / 2), m_rY - (m_rHeight / 2), m_rZ + (m_rDepth / 2), D3DCOLOR_XRGB(0, 0, 255),},		//Vertex 8 - Blue  
        {m_rX + (m_rWidth / 2), m_rY + (m_rHeight / 2), m_rZ + (m_rDepth / 2), D3DCOLOR_XRGB(0, 255, 0),},		//Vertex 9 - Green 
		 
		//Face 3 
        {m_rX - (m_rWidth / 2), m_rY - (m_rHeight / 2), m_rZ + (m_rDepth / 2), D3DCOLOR_XRGB(0, 255, 0),},		//Vertex 10 - Green  
		{m_rX - (m_rWidth / 2), m_rY + (m_rHeight / 2), m_rZ + (m_rDepth / 2), D3DCOLOR_XRGB(255, 0, 0),},		//Vertex 11 - Red  
 
		//Face 4 
        {m_rX - (m_rWidth / 2), m_rY - (m_rHeight / 2), m_rZ - (m_rDepth / 2), D3DCOLOR_XRGB(255, 0, 0),},		//Vertex 12 - Red  
        {m_rX - (m_rWidth / 2), m_rY + (m_rHeight / 2), m_rZ - (m_rDepth / 2), D3DCOLOR_XRGB(0, 0, 255),},		//Vertex 13 - Blue 
 
		//Bottom Face 
		{m_rX + (m_rWidth / 2), m_rY - (m_rHeight / 2), m_rZ - (m_rDepth / 2), D3DCOLOR_XRGB(0, 255, 0),},		//Vertex 14 - Green  
        {m_rX + (m_rWidth / 2), m_rY - (m_rHeight / 2), m_rZ + (m_rDepth / 2), D3DCOLOR_XRGB(0, 0, 255),},		//Vertex 15 - Blue  
        {m_rX - (m_rWidth / 2), m_rY - (m_rHeight / 2), m_rZ - (m_rDepth / 2), D3DCOLOR_XRGB(255, 0, 0),},		//Vertex 16 - Red  
		{m_rX - (m_rWidth / 2), m_rY - (m_rHeight / 2), m_rZ + (m_rDepth / 2), D3DCOLOR_XRGB(0, 255, 0),},		//Vertex 17 - Green 
    }; 
 
	//Get a pointer to the vertex buffer vertices and lock the vertex buffer 
    if(FAILED(m_pVertexBuffer->Lock(0, sizeof(cvVertices), (BYTE**)&pVertices, 0))) 
    { 
        return false; 
    } 
 
    //Copy our stored vertices values into the vertex buffer 
    memcpy(pVertices, cvVertices, sizeof(cvVertices)); 
 
    //Unlock the vertex buffer 
    m_pVertexBuffer->Unlock(); 
 
	return true; 
} 
 
bool CCuboid::SetSize(float rWidth, float rHeight, float rDepth) 
{ 
	m_rWidth = rWidth; 
	m_rHeight = rHeight; 
	m_rDepth = rDepth; 
 
	UpdateVertices(); 
 
	return true; 
} 
 
bool CCuboid::SetPosition(float x, float y, float z) 
{ 
	m_rX = x; 
	m_rY = y; 
	m_rZ = z; 
 
	UpdateVertices(); 
 
	return true; 
}